Oracle数据库存储过程

1、Oracle存储过程实例CREATE OR REPLACE PROCEDURE proc_page(       p_tblName IN VARCHAR,       p_fields IN VARCHAR,       p_order IN VARCHAR,       p_pageSize IN INT := 10,       p_pageIndex IN INT DEFAULT 1,       p_rowCount OUT INT,       p_returnDesc OUT VARCHAR,       p_sel_cur OUT sys_refcursor   /*在oracle中不能像mssql那样直接返回结果集查询结果必须以游标形式返回*/)AS       /*AS 到 Begin部分用于声明我们在存储过程中可能用到的变量*/       v_sqlCount VARCHAR(200);       v_sql VARCHAR(300);       v_fields VARCHAR(300);BEGIN       IF(length(trim(p_tblName)) = 0) THEN               p_returnDesc := '表名必须输入!';               RETURN;         END IF;       v_sqlCount := 'select count(*) from '||p_tblName;       /**动态执行sql语句并将执行结果保存到一个变量中*/       execute immediate v_sqlCount INTO p_rowCount;       /**执行分页查询*/       IF(TRIM(p_fields)='*') Then                v_fields := p_tblName||'.'||p_fields;       END IF;       IF(TRIM(p_fields)!='*') Then                v_fields := p_fields;       END IF;       v_sql := 'select * from (select '||v_fields||',rownum rn from '||p_tblName||' where rownum <= ';       v_sql := v_sql || (p_pageIndex*p_pageSize) || ' ) tmp where tmp.rn > ';       v_sql := v_sql || (p_pageIndex-1)*p_pageSize;       DBMS_OUTPUT.put_line(v_sql);       OPEN p_sel_cur FOR v_sql;  /**将查询结果放入游标中*/END;2、MySQl存储过程实例----（对比Oracle）drop procedure if exists proc_page;/**更改执行标识符，默认情况是分号，此处我们将其更改为$$*/delimiter $$CREATE PROCEDURE proc_page(p_tblName VARCHAR(255),p_fields VARCHAR(255),p_order VARCHAR(255),p_pageSize INT,p_pageIndex INT,p_where VARCHAR(300),OUT p_returnDesc VARCHAR(500),OUT p_rowCount INT)BEGIN      /** 参数检查*/IF(LENGTH(LTRIM(RTRIM(p_tblName))) = 0) THEN  SET p_returnDesc :=  '请输入表名!';END IF;/**统计记录总数*/  SET @count_sql  := concat('select count(*)  into @t_rowcount  from ',p_tblName);IF(LENGTH(LTRIM(RTRIM(p_where))) > 0) THEN  SET @count_sql := concat(@count_sql,'  where  ',p_where);END IF;/**执行动态语句*/PREPARE stmt_count From @count_sql;EXECUTE stmt_count;DEALLOCATE PREPARE stmt_count;/**将用户变量的值赋给输出变量*/SET p_rowCount := @t_rowcount;/**获取分页数据*/SET @sql := concat('select  ',p_fields,'  from ',p_tblName);IF(LENGTH(LTRIM(RTRIM(p_where))) > 0) THEN  SET @sql := concat(@sql,'  where  ',p_where);END IF;SET @sql := concat(@sql,' limit ',(p_pageIndex-1)*p_pageSize,' , ',p_pageSize);PREPARE stmt_page FROM @sql;execute stmt_page;DEALLOCATE PREPARE stmt_page;END;$$delimiter ; 

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